Yellow Sheet Cake with Chocolate Frosting – Moist, Buttery and Easy

Yellow Sheet Cake with Chocolate Frosting is a classic homemade dessert featuring a soft, tender vanilla cake topped with rich and creamy chocolate buttercream. Made with whole eggs, butter, sour cream, and vanilla extract, this yellow cake has a beautiful golden color and a slightly richer flavor. Baked in a simple 9×13-inch pan, it’s easy to prepare, slice, transport, and share. Whether you’re making dessert for a birthday, family gathering, or weekend treat, this buttery yellow cake with chocolate frosting is a crowd-friendly choice.

Why You’ll Love This Yellow Sheet Cake

• Soft and tender crumb: Butter, vegetable oil, sour cream, and whole milk help create a moist cake with a delicate texture.
• Rich buttery flavor: Whole eggs and vanilla give the cake its characteristic golden color and delicious vanilla flavor.
• Creamy chocolate frosting: Homemade chocolate buttercream adds a smooth, rich chocolate layer that pairs beautifully with the vanilla cake.
• Easy to serve: Baking the cake in a rectangular pan makes it simple to cut into individual slices.
• Great for gatherings: This recipe makes 15 slices, making it a practical dessert for parties, celebrations, and family meals.

Yellow Sheet Cake Ingredients

This yellow sheet cake uses familiar baking ingredients to create its soft texture and buttery flavor. Here’s what each important ingredient contributes.

For the Yellow Cake

• All-purpose flour: Provides the structure for the cake. Measuring it correctly helps prevent a dry texture.
• Baking powder and baking soda: Help the cake rise and develop a tender crumb.
• Salt: Balances the sweetness and enhances the other flavors.
• Unsalted butter: Gives the cake its rich, buttery flavor and contributes to its texture.
• Granulated sugar: Sweetens the cake and helps create a light, fluffy batter when creamed with butter.
• Vanilla extract: Adds the classic vanilla flavor that makes yellow cake so delicious.
• Vegetable oil: Adds moisture and helps keep the cake tender.
• Eggs: Whole eggs provide structure, richness, and the beautiful golden-yellow color.
• Sour cream: Adds moisture and contributes to a soft cake crumb.
• Whole milk: Helps bring the batter together while adding moisture. The recipe notes that 2% milk is acceptable, although whole milk is preferred. Avoid skim milk.

For the Chocolate Buttercream Frosting

• Unsalted butter: Creates a smooth, creamy frosting base.
• Cocoa powder: Gives the buttercream its rich chocolate flavor. Sift it before mixing to prevent lumps.
• Powdered sugar: Provides sweetness and helps create the frosting’s consistency.
• Vanilla extract: Complements the chocolate flavor.
• Salt: Balances the sweetness.
• Whipping cream or milk: Helps adjust the frosting until it reaches a smooth, spreadable consistency.

Helpful Tips for the Best Yellow Sheet Cake

• Measure the flour carefully: Whisk the flour first, then spoon it into dry measuring cups and level the top. Using a kitchen scale gives the most accurate measurement.
• Use room-temperature ingredients: Bring the butter, eggs, sour cream, and milk to room temperature before mixing. This helps the ingredients combine properly.
• Cream the butter and sugar thoroughly: Beat them for 2–4 minutes until fluffy. This step helps create the cake’s texture.
• Add the eggs one at a time: Scrape down the bowl after each addition to help everything mix evenly.
• Alternate the dry ingredients and milk: Add them gradually rather than all at once. This helps incorporate the ingredients without overmixing.
• Finish mixing gently: The original recipe recommends using a wire whisk for the last few additions to avoid overmixing.
• Check the cake for doneness: Use the visual and texture cues rather than relying only on the baking time.

How to Make Yellow Sheet Cake with Chocolate Frosting

Step 1: Prepare the Baking Pan

Preheat the oven to 350°F (180°C). Lightly grease a 9×13-inch (23 × 33 cm) baking pan.

Step 2: Combine the Dry Ingredients

Sift the all-purpose flour, baking powder, baking soda, and salt into a large bowl. Whisk everything together for approximately 30 seconds, then set aside.

Step 3: Cream the Butter and Sugar

In a large mixing bowl, beat the softened butter and granulated sugar together for 2–4 minutes, until the mixture becomes fluffy.

Step 4: Add the Oil and Vanilla

Beat the vegetable oil and vanilla extract into the butter mixture until fluffy. Scrape down the bottom and sides of the bowl as needed.

Step 5: Add the Eggs

Beat in the eggs one at a time. Turn off the mixer and scrape down the bowl after each addition to make sure the ingredients are incorporated.

Step 6: Mix in the Sour Cream

Add the sour cream to the butter mixture and mix until combined.

Step 7: Alternate the Dry Ingredients and Milk

Add the dry ingredients and milk to the butter mixture in alternating additions.
Start with one-third of the dry ingredients, followed by half of the milk. Repeat the process, finishing with the remaining dry ingredients. Scrape down the sides and bottom of the bowl after each addition.
Mix gently during the final additions to avoid overmixing the batter.

Step 8: Fill the Pan

Pour the yellow cake batter into the prepared baking pan. Use a spatula to spread it evenly and smooth the top.

Step 9: Bake the Cake

Bake on the middle rack of the preheated oven for approximately 40–45 minutes.
The cake is ready when the top looks set and begins pulling away from the sides of the pan. It should feel slightly springy when touched, and an inserted toothpick should come out clean or with a few moist cake crumbs.
Always use these doneness tests rather than relying only on the baking time.

Step 10: Cool the Cake

Remove the cake from the oven and let it cool completely in the pan before adding the chocolate frosting.

How to Make Chocolate Buttercream Frosting

Step 1: Beat the Butter

In a large bowl, beat the softened unsalted butter until smooth and creamy.

Step 2: Add the Chocolate Ingredients

Add the sifted cocoa powder, 3 cups powdered sugar, salt, and vanilla extract.
Start mixing at low speed, then gradually increase to medium speed until the ingredients are combined.

Step 3: Adjust the Frosting Consistency

Add 3 tablespoons of whipping cream and beat until fluffy.
If you prefer sweeter frosting, gradually add the remaining powdered sugar, approximately ½ cup at a time, alternating with 1 tablespoon of cream.
If the frosting is too thick, mix in more cream or milk until it reaches the desired consistency.

Step 4: Frost the Cake

Make sure the yellow cake is completely cooled before frosting.
Spread the chocolate buttercream evenly over the top using an offset spatula or the back of a spoon.

Yellow Sheet Cake Variations

Bake It in a Larger Sheet Cake Pan

The recipe can also be prepared in a 12×17-inch sheet cake pan. The baking time will be approximately 22–27 minutes. Check the cake using the recommended doneness tests.

Adjust the Chocolate Frosting

The buttercream sweetness and thickness can be adjusted by changing the amount of powdered sugar and whipping cream within the quantities provided in the recipe.

Frequently Asked Questions

Can I use 2% milk instead of whole milk?

Yes. The recipe notes that 2% milk can be used, although whole milk is preferred. Skim milk is not recommended.

Why should the ingredients be at room temperature?

Room-temperature butter, eggs, sour cream, and milk help the ingredients combine properly. This also helps avoid excessive mixing, which can lead to a tough cake crumb.

How do I know when the yellow sheet cake is done?

The top should look set and begin pulling away from the sides of the pan. It should feel slightly springy to the touch, and an inserted toothpick should come out clean or with a few moist cake crumbs.

Can I bake this cake in a larger pan?

Yes. You can use a 12×17-inch sheet cake pan instead of a 9×13-inch pan. The baking time will be approximately 22–27 minutes.

How should I store yellow sheet cake with chocolate frosting?

Store leftover cake in an airtight container at room temperature for up to 3 days or in the refrigerator for up to 5 days. If refrigerated, let the cake sit on the counter for approximately 30 minutes before serving.

Serving Suggestions

This yellow sheet cake with chocolate frosting is ideal for birthdays, family gatherings, potlucks, and celebrations. Its rectangular shape makes it easy to transport and serve a crowd.
Cut the cooled cake into 15 uniform slices and serve as a simple homemade dessert. The combination of buttery vanilla cake and creamy chocolate buttercream makes each slice delicious on its own.

Final Thoughts

This Yellow Sheet Cake with Chocolate Frosting is a simple, crowd-friendly dessert with a soft golden crumb and rich chocolate buttercream. It’s easy to prepare in a 9×13-inch pan, convenient to transport, and perfect for sharing. Save this recipe for your next celebration or whenever you’re craving homemade yellow cake.

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